better import/export

SVN=122584
diff --git a/src/cmd/gc/go.h b/src/cmd/gc/go.h
index 3ccefa8..5c65a01 100644
--- a/src/cmd/gc/go.h
+++ b/src/cmd/gc/go.h
@@ -333,6 +333,7 @@
 EXTERN	Sym*	dclstack;
 EXTERN	Sym*	b0stack;
 EXTERN	Sym*	pkgmyname;	// my name for package
+EXTERN	Sym*	pkgimportname;	// package name from imported package
 EXTERN	int	tptr;		// either TPTR32 or TPTR64
 extern	char*	sysimport;
 
@@ -498,6 +499,7 @@
 /*
  *	export.c
  */
+void	renamepkg(Node*);
 void	markexport(Node*);
 void	dumpe(Sym*);
 void	dumpexport(void);